Gently rest the lead brick on your hand; whack the top of
the brick with the hammer- lightly at first, then harder- just don't hurt
yourself. Or, rest the lead brick on the piece of candy and whack the top
of the brick with the hammer. Brick will absorb the blow, leaving candy (or
knuckles) intact.

Located in L02; section B3.

Lead brick in demo room is covered with duct tape for safety
and ease of use.